海南蕉园根际与非根际土壤氮素含量特征

Characteristics of Nitrogen Content between Rhizosphere and Bulk Soil of Banana Plantation in Hainan Province

为研究海南巴西蕉土壤根际养分与土壤母质的关系,分别采集海南地区三种母质的蕉园土壤,测定根际与非根际土壤各种形态氮素、有机质的含量特征及土壤pH的变化,并分析其差异显著性和相关性。结果表明,根际比非根际土壤全氮、铵态氮、硝态氮、碱解氮分别平均高出50.7%、35.9%、36.7%和19.3%,有机质平均高出36.8%,土壤pH平均低0.06个单位。根际与非根际全氮、硝态氮和有机质含量均成显著差异,而铵态氮和碱解氮在不同母质间的差异不同。铵态氮在根际和非根际土壤中与其他养分均无相关性。总体说来,3种母质的根际土壤养分均高于非根际土壤。

Three parent materials were being selected to find out the nutrition characteristics of Brazilian Banana between rhizosphere and bulk soil. Determined the nitrogen status of various forms, soil organic carbon content and changes of s oil pH both in the rhizosphere and bulk soil, analyzed their significant difference and relevance. The result is that： Total nitrogen, ammonium, nitrate and alkaline in rhizosphere were 50.7%, 35.9%, 36.7% and 19.3% higher than that the bulk soil. Soil organic in the rhizosphere was 36.8% higher and soil pH was lower by 0.06 units than the average. And there were significant differences in content of soil total nitrogen, nitrate and organic content between rhizosphere and bulk soil among three parent materials, however, the ammonium and alkaline were significant differences in different parent materials, Ammonium in the rhizosphere and bulk soil was not correlated with other nutrients. The nutrition of rhizosphere was higher than bulk soil in three parent materials.